package com.dpj.nio.n2.nio_test.blocking;

import com.dpj.nio.c1.ByteBufferUtil;
import lombok.extern.slf4j.Slf4j;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.util.ArrayList;
import java.util.List;

@Slf4j
public class Server {
    public static void main(String[] args) throws IOException {
        //使用nio来理解阻塞模式,单线程

        //0. ByteBuffer
        ByteBuffer buffer = ByteBuffer.allocateDirect(16);
        //1.创建了服务器
        ServerSocketChannel ssc=ServerSocketChannel.open();
        //2.绑定监听端口
        ssc.bind(new InetSocketAddress(8080));


        //3 连接集合
        List<SocketChannel> channels=new ArrayList<>();
        while (true){
            //4 accept 建立与客户端的连接 SocketChannel用来与客户端之间通信
            log.debug("connecting");
            SocketChannel accept = ssc.accept();//阻塞方法，线程停止运行
            log.debug("connected");
            channels.add(accept);
            for (SocketChannel channel : channels) {
                //5.接收客户端发送的数据
                log.debug("before read{}",channel);
                channel.read(buffer); //阻塞方法 线程停止运行
                buffer.flip();
                ByteBufferUtil.debugAll(buffer);
                buffer.clear();
                log.debug("after read{}",channel);

            }
            //5、接收客户端发送的数据
        }

    }
}
